Fluid-operated tool.



.Patented June 13, 1916.

2 SHEETS-SHEET I.

l L. w. GREVE. FLuIuoPEII/ITED IooL.

` APPLICATION FILED Nov. I4. 19m. 1,186,981.

INVENTOR ATTORNEYS wITNEssEs 2 SHEETS-SHEET 2- Patented June 13, 1916.

L. W. GREVE.

FLUID OPERATED TOOL.

APPucAUoN FILED Nov. 1,4, 19m.

firmayconcermpA A it known"that` `LfLoU/rs YW.; au p Veuf of theUi'iitelf `tatels, residing AA at eland, in "the 'countyAofCuyahogaAundofAA ()hilo,`ihave nrentedl certain A new is tulvlinprm'ementsinliluid-Uperated ,i )f which;theAfollowingis specifr "nventionArelatesyto fluil operated sand as part cularly rllustratec icihbodilnent fof theinvention s illus- .;Lteil inffthei A accoinp nving rawingl grure 1 is alongitudina-l f section through the ool, Fifilisilan(enlargedlongitudinal uiqthrollglr A the portiouof `theitool"coniiinngithe"Huicludistribution inechfanisln (lislo"L ng the iiialve:and pistonginuoneoperative Sition "iniilaiptolthat shown inlFigJjl, andi Bfiisjalongitudinul section oftliat part l `the tool shoivuiiir Fig 2,Awith fthe {Valve piston showininyfauothen operative porin g] to thegener-alf rraiigement of lsythe valve g which" is` n ising@ and giurwhich the piston 3 rre-` ates5` 41 `s :utappet` carried by `the tapiiileliloekf' securedto fthe ising 2, V ppet sfleiu'g iulaptedtoffheintermit` 'llengigeil by the piston,1 G isfthe drill `n`k,ijthe` clirillbeing shown as `brokenfoff7 is' arl il liyand lguided b'yythelohuek A Al `i'e` or Asliellfvalvel adapted] -to re- 'ate' lougitmlinallyywithinithe Avalve Q y1O`is`a. i'ulve blockluittodailjofuuug 'eblock-@intl which" is A hclii "1n place le `casirighi?,` fl A is` the`Qontrol lying fvalve,` fnually operated andil carried "the IbuSlllllsecuiedrivithinithe Yalizel" casing' 15.'

feed;roiilpistoucylinder iseoured to.l casingiAjliAandwhich carriesff:14A i adaptedto` fluid pressi-1re`suppliedAtojthe'` [TEDl STATES j' w.ensvnyzor `eLuvlruuuu,011110, Assleuoe crous-nsw To THECLEVELAND`ums/LATI@111001 communionCLEVELAND, @mme comonumou cromo, ANDufmnrfmomusotsvnnirunRooKADsILnCOMPANY, or CLEVELAND, omas A 1`raraf1normeamn troon.

p resented aune 13,1916.

M Appiaumidnovember 11;, 1914. sei-mno. 872,063,

cham l5, 1G is u feed rod adapted to be actua by the piston 14 and isfor `the pur pose feeding the tool to the Work7 ythe feed rod being;adapted to engage solne sort of support opposite the surface `to bedrilled, and 17 is a closed hollowT handler for the tool adapted tofari-y a supply of lubricent.

The piston 3 is controlled by the sleeve valve. 8 which is in turncontrolled bythe Figs. '2 and 3 the fluid distribution system consistsof the manual. control valve 11 through which Huid is fed to the too'lfrom a suitable, source, entering the tool through the passage :1S andthence int-o the storage reservoir 1.9 through the passagevQO. Thelpurpose ot the reservoir 19 is for storing a quantity of air Aunderpressure at a point piston 3. Alteferriug more particularly to adjacentthe sleeve valvef so that a constunt and immediate supply 'of fluidunder pressi'ue. is availahlethe instant the corr trollingA valve 1soperated. The reservoir also insures a uniform pressure of Huid at 'alltunes during' the operation of the tool. A

The fluidv passes from the reservoir `19 through (the passage :21,wlnch1s of greater capacit?.7 thauthe passageZO, into an annularirecess 22 inthe rear end of thevalve casing-1, and it isy from this recess that allfluid -for operating `the tool 1s supplied.

lVheu the sleeve valve 8 and the piston 3 A`are`in the position showninFigs.A 1 and A2 the circulationv of Huid is as follows: Fluid Y enters`the passage 23 in the loWerpart of `,the rear enil of the valve. hlook9 from the annular recess 25 out in the periphery of the sleeve valve S,through the'port 2G inthe `valve block 9 into the passage 27 and thencethrough the port 28 into the front end of the pistou chaiuberf 29 Whereit lots upon the front end of the piston 35 thereby driving the pistourearward). y

The fluid inthe piston Chamber 2.9 inthe A rearof the piston 3 isexhaustingthrough the` portBO leading to thelpassage 8l, and through theport 32 leading from the cham` ber 29 yto the passage 31. The passage`31 communicates ivitlran exhaust port 33 which leads from the annularrecess 34 out in the valve block' 9 to theannular exhaust passage 35surroundingf'the valve block and openingV to the atmosphere through theex# haust passage 36 at the bottom of the valve .throughfthe'passage36.A

casing 1L Fluid, therefore, exhausts from the passage" 3'1'through port33, annular' exhaust passage 35, andto the atmosphere rIhesleeve valve 8is held in the position shown in Figs.y 1 and 2 by means of a con'-stant supply of fluid undenpressure supplied to the annular recess 34through the port 37 which c'ommunicates with the passage -38 which isconstantlybpen to the" annular rrecess 22 in the valve., casing 1. Fluidin the annular recess 34 acts upon the the outside of the sleeve valve8, over ing` forward annular pressure face or are?) on.

by reason of greater area the pressu e ex erted upon the rearwardannular pressure area 40 supplied with fluid through the port 24 andpassage 23. The rearward pressure area 41 constantly receives a supplyof fluid.

under pressure from the reservoir 19 4through passage 21, annular groove22, port 42 and port 43. In the rear portion of the valve 8 as showninFigs. 1 and 2, the pres sure on the rearward pressure area'4l isreduced below thepressure on the pressure area 39 because of the passage44 in the sleeve valve 8 which leads from the pressure area -41 totheforward end of the sleeve valve and opens into the rear of the pistonchamber 29 through the port 45. As the fluid in lthe piston chamber 29is exhausting behind the piston 3, the pressure on the surface 4l isconsiderably lower than the pressure/on the pressurearea 39 by reav sonof the low pressure in' the passage 44 which is bleeding the fluidv fromthe pressure area 41. 'lie extreme rear end area 46 of the sleeve valve1s not receiving any pressure .above"exhaust pressure while thevalve is.in the rearward position, and as the pressure area 41 is of smaller areathan the pressure area 39 andi receives less pressure, and as the areaefthe pressure area 40 is less than the pressure area 39,.the valve willremain in the rearward position until 'pressure conditions on thevarious pressure areas are changed.

closes the exhaust port 30, and when the 505 rear end enters the .sleeve'valve the exhaustn When the' piston 3 moves rearward it. first `port 32is shut off from the piston chamber, andl the extreme forward pressurearea 47 of the sleeve valve 8 is thence subject only to exhaustpressure.' movementof the piston covers the port 45 which portVestablishes communication between .the piston chamber and the rearwardpressure area` 41, and as the fluid through 1 the port 45 can no longerexhaust' the pressure on the pressure area 41.l immediately rises torthat onIthe pressure` area 39, and together with the constant pressureon the rearward pressure area 40 and the pressure onthe extreme reararea 46 overcomes the r`constant pressure.. on the pressure area 39passage 23 and through the port 43 into the Further -rearward 1resulting in the shifting of the valve to the forward position as shownin Fig. 3. lVhen the front end of the piston 3 passes the port 30 thepressure in the front end of the piston lchamber is suddenly reduced andaided by the compression of the trapped fluid in the rear end of thechamber the piston is vcushioned'and stopped before it engages the rearend of the chamber.

, Referring to Fig. 3 the circuit of the `fluid from the rservoir 19when the parts are in the position shown therein is as follows. Thefluid enters the annular recess 22 through the passage v21, thence intothe extreme rear end of the piston chamber forcing the piston 3 forward.The fluid in front of the piston 3 exhausts to the utmosphere throughthe portv 28, passage 27, *l

Yexhaust port 49, annular recess 34, exhaust port 33 ``at the top of thevalve block. 9, an-

sage 38 was reduced owing to the exhausting 100 of the fluid in theforward end of the piston chamber, therefore reducing the pressure onthe forward pressure area 39 which is supplied with fluid through theport 37 leading `from the passage 38. This reduction ofpressure aswellas the reduction of pressure on the extreme forward pressure area 47on the sleeve valve when the piston 3 entered the sleeve valve .on itsrearward stroke, caused the forward shifting of the sleeve valve intoposition shown in Fig. 3, l therefore when the front end of the piston 3covers the port 38 upon itsforward stroke and .the rear end ofthe pistonmoves outof thesleeve valve subjecting the pressure area 47 tothe highpressure in the rear of the'piston 3, the pressures lthus exerted uponthe pressure areas 39 and 47, because of their superior area willovercome the pressureexerted upon the rearward pressure areas 41and l46and the valve will be forced rearwardly. The pressure on the rearwardpressure area'40'is reduced because the (luid is exhaustlng throughthe'exhaust port and therefore offers but little resistance to therearward movement of the valve.

Briefly, the sleeve valve is shifted forwardly by high pressure exertedon the rearward pressure areas 4l aude() overcoming the high pressure onthe forward pressure 139 leo . y recess 22 from whence-'it Carriedtothe.,

area 39 and the low 'pressure on the extreme forward pressure area 4:7;The rearward movement of the valve is caused by high pressure' on theextreme. forward pressure 5 area 4 7 and the forward pressure area 39overcoming low pressure onl therearward pressurearea 40 and highpressure on the rearward pressureareas 41 and 46; A constant supply offluid is supplied to the `.pressure area 39 tending to `nuove the valverearwardly anda constant supply of fluid is supplied rtothe rearwardpressure area 41 tendingl to move the valve forward, the movement vof'the valve being controlled by the piston which opens and Yclosesvarious ports and passages for reducing and. increasmg pressure on otherpressure surfaces servl ing to alter. the balance of pressure first onone end of the valve and then on the' $0 other.` The valve 8 controlstheadmission and exhaust tothe piston chamber in such manner as to causethe piston 3 to reciprocate within the piston chamber. Y A

`The sleeve and piston valve are lubricated bymeans of a supply'of oil-inclosed 'within the handle17,- the oil being conducted to thevalvethrough theport 50 leading from the ".,han'dle to the controllingvalve 11, thence f around the groovel in the peripheryofthe Yvalve 11through the port 52 into the annular l moving parts. y

. The operation of the 'tool is as follows. The tooll is frirst adjustedto the work ready for drilling and thevalve 11 turned so that fluid maypass from the passage, 18 in the valve through the paagie 20 into thestorage reservoir 19. Starti 4 with the parts in the through the passage21 into the annular groove 22 and thence into the passage 23,

. Athrough port 24 around-the annulargroove.

25 in the valve 11', throughtheport 26, and

passage 27 into the front end of the pistoni chamber 29 through the port28.-] The piston ballet-passage 36 to the atmosphere When: I thepiston':3` covers the smal-l port 45in the i. interiorfofthe valve 8v, theincreased vprefure" Mcaused thereby on the pressure area 41 causes the"valveto move forward to the` osition shownin Fig.f3. 'The forward shiting of thejvalve closes the port 24 and opens the-"a porti@ leading tothe rear end of the pistonfv I0 chamber, thereby permitting the entranceof the fluid to-therear end of the piston chamber which forces thepiston 3 forward to strikethe tappete a sharp blow which in` turnimparts the` blow the drill tool 6.

o l The forward' shifting ofthe valve opens the' position shown, in Fig.2, the fluid `passes 'y the cylinder and a lishing communicatlon betweenthe oppocf f;-

- the cylinder adapted to be closed'by the is# 3 is forced rearwardbythe fluid thus enter-5 ing thechamber, and the fluid in the rear endolV the piston chamber is exhausting through the ports 30 and 32 intothe exhaust passage 'j :31v 'and thence through the'port 33, the annue.lar "passage 35 and finally 'through the ex'- Y having a` pistonIadapted to reciprocatev ying the inlet with.theinterwrgofjth y. lm; vto one-endg lle-` 'port 49 leading from the passage 27, which allows thefluid in the front end of the piston chamber to exhaust through the port28, passage 27, port 49, around annular recess 34, exhaust port 33,annular passage 35 andl exhaust passage 36.

When the piston 3 moves forward suiii cientdistance to cover-the port38', the inn crease or" pressure in the passage 38 -communicating withthe pressure area 39 by means of the port 37, together with the pistonchamber pressureexerted upon' the pressureA area 47, causes the valve tobe shifted rearwardly tothe starting position as shown in Figs. 1 and 2.The rearward shifting of the valve again causes the piston to moverearward and the cycle of movements is con tinued, as long as fluid.is'supp'lied to thew reservoir 19. p

The 'rapid andintermittent impact of the piston 3 upon the tappet causesthe drill to gradually bore a hole in .therock or other substance to bedrilled. l

It is obvious. that certa-in'y modifications seV trolling the pistonlinto which lthe piston is moved, provided with apressure surface, meansfor supplying a constantesupply of fluid to such surface to hold thevalve in one i operative position, an 'oppositely disposed "pressure'surface on thevalve having greater area than the first pressure area,1neans for supplying a constant .suppl of'pressure to the oppositelydisposed sur ace, an exhaust passage communicating with the interidrfofort inY the valve estaba `sitely 'disposedl surface and the interior tonwhen the pistonentersthe valve.5

.in combination in-a fluid operated'teol,

in. Ja cylinder, a .sleeve distributing vai controlling thepiston, a`fluid supply controlled by the' valve, a assagegf port controlled bythe,valvefor yexija'listin .Huid rom'the same end of the cylinder-"ang, anannular groove surrounding-fthe valve? unece: I

m thesaurus.. Iinderganexhaustif;

tor.establishingl communicationbetween thai. l.

'saidports when they are'uiicovered byjlilie sleeve valve. l

3.1;f-In combination in a operatedft'ool `huvlng a piston ladapted .toreciprocatefwithiin a' cylinder, a distributing valve forconies trollingtheiuid for operating the piston, 18e' a fluid supply inlet, a fiuidsupply lpassage connecting the inlet with the interior of the' cylinder,an outlet port in the fluid suptributing valve, and an annulargroovesur-A roundmg the valve for connectlng the sald ports when thefvalve ismoved to open the ports.

4. -In combinationin a fluid operated tool having a piston adapted toreciprocate withvalve, an

in a cylinder, a distributing vvalve for controlling the'fluidforoperating the piston, a

iuid supply inlet, a fluid supply passage connecting the inlet with theinterior of` onel end of the cylinder, anoutlet port inthe fluid supplypassage intermediate the supply inlet andthe cylinder controlled by thetexhaust port controlled by the valve substantially in the same planewith the outlet port for exhausting fluid from the same end of thecylinder and adapted to be closed by the distributing valve, and anannular groove surrounding the valve for connecting thezjsaid ports whenthe valve is moved'to open the ports.

5. In combination in a fiuid operated tool having al piston adapted toreciprocate'withed to A stantly supplying fluid pressure to'thesaidpressure4 areas, an exhaust passage commuln a cylinder, a sleeve valvel`for controlling the plston posed differential pressure areas, 'andadaptreceive the piston, means for connlcating with the-cylinder, and aport in I the vave'estabh'shing communication bet'ween the pressurearea, of greater area and the interior of Ithe cylinder adapted vto beclosed by the ,piston to prevent the escape of fluid from the pressurearea of greater area into the cylmderuhen the port is closed.

ln comblnatlon in` a fluid operated 'with admission provided withoppositely dis-' tool having a piston adapted to reciprocate within thecylinder, a fluid chamber, a distributing valve for controlling themovement of the piston adapted to reciprocate within a valve.`chan'iber, an annular groove in the valve chamber .surrounding the dis-.tributing valve, an annular enlargement upon the valve adapted tooperate in the groove, a fluid supply passage leading from the fluidsupply to the piston cylinder and communicating With the annular groovev'through a port adapted to beclosed by the annular enlargement of thevalve When the valve 17s 1n one 1 operative. positlon, an' exhaustpassage leading from the annular groove adapted to be closed by theannular enlargement of the valve when the valve is in position to closethe said port, and means on the valve for closing the supply 'passagebetvreen'the fluid supply'and the piston cyl-- inder when the valveis'move'd to"uneover the said port and the said exhaust passage toestablish communication therebetween.

y7. In combination in `a fluid operated tool, a casing, a piston-chamberprovided side Walls, a Ashe valve at the end of the chamber throughwhich fluid from the ad-l a pis mission ports passes to the chamber, tonworking through the chamber and lthrough ,the shell valve, a feedcylinder and piston', in alinement with the piston cham-A ber but spacedawayI therefrom, and a storage reservoir located in the spacebetween'the ends ofthe piston chamber and:4 feed cylinder, such reservoir beingsuppliedA with fliud under pressure and communicating with the saidports.

In testimony whereof I have hereunto signed my name in vthe presenceofthe two subscribed Witnesses.

Louis W. GREVE. i Witnessesr- ,Y GEO. H. HALL,

J. DE Moor,

Borte leading through its

